| /* |
| * (C) Copyright 2008-2011 |
| * Graeme Russ, <graeme.russ@gmail.com> |
| * |
| * (C) Copyright 2002 |
| * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se> |
| * |
| * Portions of this file are derived from the Linux kernel source |
| * Copyright (C) 1991, 1992 Linus Torvalds |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <asm/cache.h> |
| #include <asm/control_regs.h> |
| #include <asm/interrupt.h> |
| #include <asm/io.h> |
| #include <asm/processor-flags.h> |
| #include <linux/compiler.h> |
| #include <asm/msr.h> |
| #include <asm/u-boot-x86.h> |
| #include <asm/i8259.h> |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| #define DECLARE_INTERRUPT(x) \ |
| ".globl irq_"#x"\n" \ |
| ".hidden irq_"#x"\n" \ |
| ".type irq_"#x", @function\n" \ |
| "irq_"#x":\n" \ |
| "pushl $"#x"\n" \ |
| "jmp irq_common_entry\n" |
| |
| static void dump_regs(struct irq_regs *regs) |
| { |
| unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L; |
| unsigned long d0, d1, d2, d3, d6, d7; |
| unsigned long sp; |
| |
| printf("EIP: %04x:[<%08lx>] EFLAGS: %08lx\n", |
| (u16)regs->xcs, regs->eip, regs->eflags); |
| |
| printf("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n", |
| regs->eax, regs->ebx, regs->ecx, regs->edx); |
| printf("ESI: %08lx EDI: %08lx EBP: %08lx ESP: %08lx\n", |
| regs->esi, regs->edi, regs->ebp, regs->esp); |
| printf(" DS: %04x ES: %04x FS: %04x GS: %04x SS: %04x\n", |
| (u16)regs->xds, (u16)regs->xes, (u16)regs->xfs, |
| (u16)regs->xgs, (u16)regs->xss); |
| |
| cr0 = read_cr0(); |
| cr2 = read_cr2(); |
| cr3 = read_cr3(); |
| cr4 = read_cr4(); |
| |
| printf("CR0: %08lx CR2: %08lx CR3: %08lx CR4: %08lx\n", |
| cr0, cr2, cr3, cr4); |
| |
| d0 = get_debugreg(0); |
| d1 = get_debugreg(1); |
| d2 = get_debugreg(2); |
| d3 = get_debugreg(3); |
| |
| printf("DR0: %08lx DR1: %08lx DR2: %08lx DR3: %08lx\n", |
| d0, d1, d2, d3); |
| |
| d6 = get_debugreg(6); |
| d7 = get_debugreg(7); |
| printf("DR6: %08lx DR7: %08lx\n", |
| d6, d7); |
| |
| printf("Stack:\n"); |
| sp = regs->esp; |
| |
| sp += 64; |
| |
| while (sp > (regs->esp - 16)) { |
| if (sp == regs->esp) |
| printf("--->"); |
| else |
| printf(" "); |
| printf("0x%8.8lx : 0x%8.8lx\n", sp, (ulong)readl(sp)); |
| sp -= 4; |
| } |
| } |
| |
| struct idt_entry { |
| u16 base_low; |
| u16 selector; |
| u8 res; |
| u8 access; |
| u16 base_high; |
| } __packed; |
| |
| struct desc_ptr { |
| unsigned short size; |
| unsigned long address; |
| unsigned short segment; |
| } __packed; |
| |
| struct idt_entry idt[256] __aligned(16); |
| |
| struct desc_ptr idt_ptr; |
| |
| static inline void load_idt(const struct desc_ptr *dtr) |
| { |
| asm volatile("cs lidt %0" : : "m" (*dtr)); |
| } |
| |
| void set_vector(u8 intnum, void *routine) |
| { |
| idt[intnum].base_high = (u16)((u32)(routine) >> 16); |
| idt[intnum].base_low = (u16)((u32)(routine) & 0xffff); |
| } |
| |
| /* |
| * Ideally these would be defined static to avoid a checkpatch warning, but |
| * the compiler cannot see them in the inline asm and complains that they |
| * aren't defined |
| */ |
| void irq_0(void); |
| void irq_1(void); |
| |
| int cpu_init_interrupts(void) |
| { |
| int i; |
| |
| int irq_entry_size = irq_1 - irq_0; |
| void *irq_entry = (void *)irq_0; |
| |
| /* Setup the IDT */ |
| for (i = 0; i < 256; i++) { |
| idt[i].access = 0x8e; |
| idt[i].res = 0; |
| idt[i].selector = 0x10; |
| set_vector(i, irq_entry); |
| irq_entry += irq_entry_size; |
| } |
| |
| idt_ptr.size = 256 * 8; |
| idt_ptr.address = (unsigned long) idt; |
| idt_ptr.segment = 0x18; |
| |
| load_idt(&idt_ptr); |
| |
| return 0; |
| } |
| |
| void *x86_get_idt(void) |
| { |
| return &idt_ptr; |
| } |
| |
| void __do_irq(int irq) |
| { |
| printf("Unhandled IRQ : %d\n", irq); |
| } |
| void do_irq(int irq) __attribute__((weak, alias("__do_irq"))); |
| |
| void enable_interrupts(void) |
| { |
| asm("sti\n"); |
| } |
| |
| int disable_interrupts(void) |
| { |
| long flags; |
| |
| asm volatile ("pushfl ; popl %0 ; cli\n" : "=g" (flags) : ); |
| |
| return flags & X86_EFLAGS_IF; |
| } |
| |
| int interrupt_init(void) |
| { |
| /* Just in case... */ |
| disable_interrupts(); |
| |
| #ifdef CONFIG_SYS_PCAT_INTERRUPTS |
| /* Initialize the master/slave i8259 pic */ |
| i8259_init(); |
| #endif |
| |
| /* Initialize core interrupt and exception functionality of CPU */ |
| cpu_init_interrupts(); |
| |
| /* It is now safe to enable interrupts */ |
| enable_interrupts(); |
| |
| return 0; |
| } |
| |
| /* IRQ Low-Level Service Routine */ |
| void irq_llsr(struct irq_regs *regs) |
| { |
| /* |
| * For detailed description of each exception, refer to: |
| * Intel® 64 and IA-32 Architectures Software Developer's Manual |
| * Volume 1: Basic Architecture |
| * Order Number: 253665-029US, November 2008 |
| * Table 6-1. Exceptions and Interrupts |
| */ |
| switch (regs->irq_id) { |
| case 0x00: |
| printf("Divide Error (Division by zero)\n"); |
| dump_regs(regs); |
| hang(); |
| break; |
| case 0x01: |
| printf("Debug Interrupt (Single step)\n"); |
| dump_regs(regs); |
| break; |
| case 0x02: |
| printf("NMI Interrupt\n"); |
| dump_regs(regs); |
| break; |
| case 0x03: |
| printf("Breakpoint\n"); |
| dump_regs(regs); |
| break; |
| case 0x04: |
| printf("Overflow\n"); |
| dump_regs(regs); |
| hang(); |
| break; |
| case 0x05: |
| printf("BOUND Range Exceeded\n"); |
| dump_regs(regs); |
| hang(); |
| break; |
| case 0x06: |
| printf("Invalid Opcode (UnDefined Opcode)\n"); |
| dump_regs(regs); |
| hang(); |
| break; |
| case 0x07: |
| printf("Device Not Available (No Math Coprocessor)\n"); |
| dump_regs(regs); |
| hang(); |
| break; |
| case 0x08: |
| printf("Double fault\n"); |
| dump_regs(regs); |
| hang(); |
| break; |
| case 0x09: |
| printf("Co-processor segment overrun\n"); |
| dump_regs(regs); |
| hang(); |
| break; |
| case 0x0a: |
| printf("Invalid TSS\n"); |
| dump_regs(regs); |
| break; |
| case 0x0b: |
| printf("Segment Not Present\n"); |
| dump_regs(regs); |
| hang(); |
| break; |
| case 0x0c: |
| printf("Stack Segment Fault\n"); |
| dump_regs(regs); |
| hang(); |
| break; |
| case 0x0d: |
| printf("General Protection\n"); |
| dump_regs(regs); |
| break; |
| case 0x0e: |
| printf("Page fault\n"); |
| dump_regs(regs); |
| hang(); |
| break; |
| case 0x0f: |
| printf("Floating-Point Error (Math Fault)\n"); |
| dump_regs(regs); |
| break; |
| case 0x10: |
| printf("Alignment check\n"); |
| dump_regs(regs); |
| break; |
| case 0x11: |
| printf("Machine Check\n"); |
| dump_regs(regs); |
| break; |
| case 0x12: |
| printf("SIMD Floating-Point Exception\n"); |
| dump_regs(regs); |
| break; |
| case 0x13: |
| case 0x14: |
| case 0x15: |
| case 0x16: |
| case 0x17: |
| case 0x18: |
| case 0x19: |
| case 0x1a: |
| case 0x1b: |
| case 0x1c: |
| case 0x1d: |
| case 0x1e: |
| case 0x1f: |
| printf("Reserved Exception\n"); |
| dump_regs(regs); |
| break; |
| |
| default: |
| /* Hardware or User IRQ */ |
| do_irq(regs->irq_id); |
| } |
| } |
| |
| /* |
| * OK - This looks really horrible, but it serves a purpose - It helps create |
| * fully relocatable code. |
| * - The call to irq_llsr will be a relative jump |
| * - The IRQ entries will be guaranteed to be in order |
| * Interrupt entries are now very small (a push and a jump) but they are |
| * now slower (all registers pushed on stack which provides complete |
| * crash dumps in the low level handlers |
| * |
| * Interrupt Entry Point: |
| * - Interrupt has caused eflags, CS and EIP to be pushed |
| * - Interrupt Vector Handler has pushed orig_eax |
| * - pt_regs.esp needs to be adjusted by 40 bytes: |
| * 12 bytes pushed by CPU (EFLAGSF, CS, EIP) |
| * 4 bytes pushed by vector handler (irq_id) |
| * 24 bytes pushed before SP (SS, GS, FS, ES, DS, EAX) |
| * NOTE: Only longs are pushed on/popped off the stack! |
| */ |
| asm(".globl irq_common_entry\n" \ |
| ".hidden irq_common_entry\n" \ |
| ".type irq_common_entry, @function\n" \ |
| "irq_common_entry:\n" \ |
| "cld\n" \ |
| "pushl %ss\n" \ |
| "pushl %gs\n" \ |
| "pushl %fs\n" \ |
| "pushl %es\n" \ |
| "pushl %ds\n" \ |
| "pushl %eax\n" \ |
| "movl %esp, %eax\n" \ |
| "addl $40, %eax\n" \ |
| "pushl %eax\n" \ |
| "pushl %ebp\n" \ |
| "pushl %edi\n" \ |
| "pushl %esi\n" \ |
| "pushl %edx\n" \ |
| "pushl %ecx\n" \ |
| "pushl %ebx\n" \ |
| "mov %esp, %eax\n" \ |
| "call irq_llsr\n" \ |
| "popl %ebx\n" \ |
| "popl %ecx\n" \ |
| "popl %edx\n" \ |
| "popl %esi\n" \ |
| "popl %edi\n" \ |
| "popl %ebp\n" \ |
| "popl %eax\n" \ |
| "popl %eax\n" \ |
| "popl %ds\n" \ |
| "popl %es\n" \ |
| "popl %fs\n" \ |
| "popl %gs\n" \ |
| "popl %ss\n" \ |
| "add $4, %esp\n" \ |
| "iret\n" \ |
| DECLARE_INTERRUPT(0) \ |
| DECLARE_INTERRUPT(1) \ |
| DECLARE_INTERRUPT(2) \ |
| DECLARE_INTERRUPT(3) \ |
| DECLARE_INTERRUPT(4) \ |
| DECLARE_INTERRUPT(5) \ |
| DECLARE_INTERRUPT(6) \ |
| DECLARE_INTERRUPT(7) \ |
| DECLARE_INTERRUPT(8) \ |
| DECLARE_INTERRUPT(9) \ |
| DECLARE_INTERRUPT(10) \ |
| DECLARE_INTERRUPT(11) \ |
| DECLARE_INTERRUPT(12) \ |
| DECLARE_INTERRUPT(13) \ |
| DECLARE_INTERRUPT(14) \ |
| DECLARE_INTERRUPT(15) \ |
| DECLARE_INTERRUPT(16) \ |
| DECLARE_INTERRUPT(17) \ |
| DECLARE_INTERRUPT(18) \ |
| DECLARE_INTERRUPT(19) \ |
| DECLARE_INTERRUPT(20) \ |
| DECLARE_INTERRUPT(21) \ |
| DECLARE_INTERRUPT(22) \ |
| DECLARE_INTERRUPT(23) \ |
| DECLARE_INTERRUPT(24) \ |
| DECLARE_INTERRUPT(25) \ |
| DECLARE_INTERRUPT(26) \ |
| DECLARE_INTERRUPT(27) \ |
| DECLARE_INTERRUPT(28) \ |
| DECLARE_INTERRUPT(29) \ |
| DECLARE_INTERRUPT(30) \ |
| DECLARE_INTERRUPT(31) \ |
| DECLARE_INTERRUPT(32) \ |
| DECLARE_INTERRUPT(33) \ |
| DECLARE_INTERRUPT(34) \ |
| DECLARE_INTERRUPT(35) \ |
| DECLARE_INTERRUPT(36) \ |
| DECLARE_INTERRUPT(37) \ |
| DECLARE_INTERRUPT(38) \ |
| DECLARE_INTERRUPT(39) \ |
| DECLARE_INTERRUPT(40) \ |
| DECLARE_INTERRUPT(41) \ |
| DECLARE_INTERRUPT(42) \ |
| DECLARE_INTERRUPT(43) \ |
| DECLARE_INTERRUPT(44) \ |
| DECLARE_INTERRUPT(45) \ |
| DECLARE_INTERRUPT(46) \ |
| DECLARE_INTERRUPT(47) \ |
| DECLARE_INTERRUPT(48) \ |
| DECLARE_INTERRUPT(49) \ |
| DECLARE_INTERRUPT(50) \ |
| DECLARE_INTERRUPT(51) \ |
| DECLARE_INTERRUPT(52) \ |
| DECLARE_INTERRUPT(53) \ |
| DECLARE_INTERRUPT(54) \ |
| DECLARE_INTERRUPT(55) \ |
| DECLARE_INTERRUPT(56) \ |
| DECLARE_INTERRUPT(57) \ |
| DECLARE_INTERRUPT(58) \ |
| DECLARE_INTERRUPT(59) \ |
| DECLARE_INTERRUPT(60) \ |
| DECLARE_INTERRUPT(61) \ |
| DECLARE_INTERRUPT(62) \ |
| DECLARE_INTERRUPT(63) \ |
| DECLARE_INTERRUPT(64) \ |
| DECLARE_INTERRUPT(65) \ |
| DECLARE_INTERRUPT(66) \ |
| DECLARE_INTERRUPT(67) \ |
| DECLARE_INTERRUPT(68) \ |
| DECLARE_INTERRUPT(69) \ |
| DECLARE_INTERRUPT(70) \ |
| DECLARE_INTERRUPT(71) \ |
| DECLARE_INTERRUPT(72) \ |
| DECLARE_INTERRUPT(73) \ |
| DECLARE_INTERRUPT(74) \ |
| DECLARE_INTERRUPT(75) \ |
| DECLARE_INTERRUPT(76) \ |
| DECLARE_INTERRUPT(77) \ |
| DECLARE_INTERRUPT(78) \ |
| DECLARE_INTERRUPT(79) \ |
| DECLARE_INTERRUPT(80) \ |
| DECLARE_INTERRUPT(81) \ |
| DECLARE_INTERRUPT(82) \ |
| DECLARE_INTERRUPT(83) \ |
| DECLARE_INTERRUPT(84) \ |
| DECLARE_INTERRUPT(85) \ |
| DECLARE_INTERRUPT(86) \ |
| DECLARE_INTERRUPT(87) \ |
| DECLARE_INTERRUPT(88) \ |
| DECLARE_INTERRUPT(89) \ |
| DECLARE_INTERRUPT(90) \ |
| DECLARE_INTERRUPT(91) \ |
| DECLARE_INTERRUPT(92) \ |
| DECLARE_INTERRUPT(93) \ |
| DECLARE_INTERRUPT(94) \ |
| DECLARE_INTERRUPT(95) \ |
| DECLARE_INTERRUPT(97) \ |
| DECLARE_INTERRUPT(96) \ |
| DECLARE_INTERRUPT(98) \ |
| DECLARE_INTERRUPT(99) \ |
| DECLARE_INTERRUPT(100) \ |
| DECLARE_INTERRUPT(101) \ |
| DECLARE_INTERRUPT(102) \ |
| DECLARE_INTERRUPT(103) \ |
| DECLARE_INTERRUPT(104) \ |
| DECLARE_INTERRUPT(105) \ |
| DECLARE_INTERRUPT(106) \ |
| DECLARE_INTERRUPT(107) \ |
| DECLARE_INTERRUPT(108) \ |
| DECLARE_INTERRUPT(109) \ |
| DECLARE_INTERRUPT(110) \ |
| DECLARE_INTERRUPT(111) \ |
| DECLARE_INTERRUPT(112) \ |
| DECLARE_INTERRUPT(113) \ |
| DECLARE_INTERRUPT(114) \ |
| DECLARE_INTERRUPT(115) \ |
| DECLARE_INTERRUPT(116) \ |
| DECLARE_INTERRUPT(117) \ |
| DECLARE_INTERRUPT(118) \ |
| DECLARE_INTERRUPT(119) \ |
| DECLARE_INTERRUPT(120) \ |
| DECLARE_INTERRUPT(121) \ |
| DECLARE_INTERRUPT(122) \ |
| DECLARE_INTERRUPT(123) \ |
| DECLARE_INTERRUPT(124) \ |
| DECLARE_INTERRUPT(125) \ |
| DECLARE_INTERRUPT(126) \ |
| DECLARE_INTERRUPT(127) \ |
| DECLARE_INTERRUPT(128) \ |
| DECLARE_INTERRUPT(129) \ |
| DECLARE_INTERRUPT(130) \ |
| DECLARE_INTERRUPT(131) \ |
| DECLARE_INTERRUPT(132) \ |
| DECLARE_INTERRUPT(133) \ |
| DECLARE_INTERRUPT(134) \ |
| DECLARE_INTERRUPT(135) \ |
| DECLARE_INTERRUPT(136) \ |
| DECLARE_INTERRUPT(137) \ |
| DECLARE_INTERRUPT(138) \ |
| DECLARE_INTERRUPT(139) \ |
| DECLARE_INTERRUPT(140) \ |
| DECLARE_INTERRUPT(141) \ |
| DECLARE_INTERRUPT(142) \ |
| DECLARE_INTERRUPT(143) \ |
| DECLARE_INTERRUPT(144) \ |
| DECLARE_INTERRUPT(145) \ |
| DECLARE_INTERRUPT(146) \ |
| DECLARE_INTERRUPT(147) \ |
| DECLARE_INTERRUPT(148) \ |
| DECLARE_INTERRUPT(149) \ |
| DECLARE_INTERRUPT(150) \ |
| DECLARE_INTERRUPT(151) \ |
| DECLARE_INTERRUPT(152) \ |
| DECLARE_INTERRUPT(153) \ |
| DECLARE_INTERRUPT(154) \ |
| DECLARE_INTERRUPT(155) \ |
| DECLARE_INTERRUPT(156) \ |
| DECLARE_INTERRUPT(157) \ |
| DECLARE_INTERRUPT(158) \ |
| DECLARE_INTERRUPT(159) \ |
| DECLARE_INTERRUPT(160) \ |
| DECLARE_INTERRUPT(161) \ |
| DECLARE_INTERRUPT(162) \ |
| DECLARE_INTERRUPT(163) \ |
| DECLARE_INTERRUPT(164) \ |
| DECLARE_INTERRUPT(165) \ |
| DECLARE_INTERRUPT(166) \ |
| DECLARE_INTERRUPT(167) \ |
| DECLARE_INTERRUPT(168) \ |
| DECLARE_INTERRUPT(169) \ |
| DECLARE_INTERRUPT(170) \ |
| DECLARE_INTERRUPT(171) \ |
| DECLARE_INTERRUPT(172) \ |
| DECLARE_INTERRUPT(173) \ |
| DECLARE_INTERRUPT(174) \ |
| DECLARE_INTERRUPT(175) \ |
| DECLARE_INTERRUPT(176) \ |
| DECLARE_INTERRUPT(177) \ |
| DECLARE_INTERRUPT(178) \ |
| DECLARE_INTERRUPT(179) \ |
| DECLARE_INTERRUPT(180) \ |
| DECLARE_INTERRUPT(181) \ |
| DECLARE_INTERRUPT(182) \ |
| DECLARE_INTERRUPT(183) \ |
| DECLARE_INTERRUPT(184) \ |
| DECLARE_INTERRUPT(185) \ |
| DECLARE_INTERRUPT(186) \ |
| DECLARE_INTERRUPT(187) \ |
| DECLARE_INTERRUPT(188) \ |
| DECLARE_INTERRUPT(189) \ |
| DECLARE_INTERRUPT(190) \ |
| DECLARE_INTERRUPT(191) \ |
| DECLARE_INTERRUPT(192) \ |
| DECLARE_INTERRUPT(193) \ |
| DECLARE_INTERRUPT(194) \ |
| DECLARE_INTERRUPT(195) \ |
| DECLARE_INTERRUPT(196) \ |
| DECLARE_INTERRUPT(197) \ |
| DECLARE_INTERRUPT(198) \ |
| DECLARE_INTERRUPT(199) \ |
| DECLARE_INTERRUPT(200) \ |
| DECLARE_INTERRUPT(201) \ |
| DECLARE_INTERRUPT(202) \ |
| DECLARE_INTERRUPT(203) \ |
| DECLARE_INTERRUPT(204) \ |
| DECLARE_INTERRUPT(205) \ |
| DECLARE_INTERRUPT(206) \ |
| DECLARE_INTERRUPT(207) \ |
| DECLARE_INTERRUPT(208) \ |
| DECLARE_INTERRUPT(209) \ |
| DECLARE_INTERRUPT(210) \ |
| DECLARE_INTERRUPT(211) \ |
| DECLARE_INTERRUPT(212) \ |
| DECLARE_INTERRUPT(213) \ |
| DECLARE_INTERRUPT(214) \ |
| DECLARE_INTERRUPT(215) \ |
| DECLARE_INTERRUPT(216) \ |
| DECLARE_INTERRUPT(217) \ |
| DECLARE_INTERRUPT(218) \ |
| DECLARE_INTERRUPT(219) \ |
| DECLARE_INTERRUPT(220) \ |
| DECLARE_INTERRUPT(221) \ |
| DECLARE_INTERRUPT(222) \ |
| DECLARE_INTERRUPT(223) \ |
| DECLARE_INTERRUPT(224) \ |
| DECLARE_INTERRUPT(225) \ |
| DECLARE_INTERRUPT(226) \ |
| DECLARE_INTERRUPT(227) \ |
| DECLARE_INTERRUPT(228) \ |
| DECLARE_INTERRUPT(229) \ |
| DECLARE_INTERRUPT(230) \ |
| DECLARE_INTERRUPT(231) \ |
| DECLARE_INTERRUPT(232) \ |
| DECLARE_INTERRUPT(233) \ |
| DECLARE_INTERRUPT(234) \ |
| DECLARE_INTERRUPT(235) \ |
| DECLARE_INTERRUPT(236) \ |
| DECLARE_INTERRUPT(237) \ |
| DECLARE_INTERRUPT(238) \ |
| DECLARE_INTERRUPT(239) \ |
| DECLARE_INTERRUPT(240) \ |
| DECLARE_INTERRUPT(241) \ |
| DECLARE_INTERRUPT(242) \ |
| DECLARE_INTERRUPT(243) \ |
| DECLARE_INTERRUPT(244) \ |
| DECLARE_INTERRUPT(245) \ |
| DECLARE_INTERRUPT(246) \ |
| DECLARE_INTERRUPT(247) \ |
| DECLARE_INTERRUPT(248) \ |
| DECLARE_INTERRUPT(249) \ |
| DECLARE_INTERRUPT(250) \ |
| DECLARE_INTERRUPT(251) \ |
| DECLARE_INTERRUPT(252) \ |
| DECLARE_INTERRUPT(253) \ |
| DECLARE_INTERRUPT(254) \ |
| DECLARE_INTERRUPT(255)); |